RTAA-SVX01A-EN 39
Installation — Remote Evaporator
Example Liquid Line Sizing
For this example, refer to Table 2, 3, 4, and Figure 22, and assume a 50 ton
circuit.
1. From Figure 22, the actual length of field installed piping is:
80+8+8+21 =117 feet
2. Estimate equivalent line length:
117 feet x 5=175 feet
3. From Table 4 for a 50 ton circuit, for 175 equivalent feet the OD is
1-3/8 inches.
4. In Figure 22 there are six long-radius elbows. From Table 3, for
1-3/8 inch elbows, the equivalent feet is:
6 elbows x 2.2 feet = 13.2 feet
5. Adding equivalent feet from step #4 to step #1 gives:
13.2 feet + 117 feet = 130.2 feet
6. From Table 4, for a 50 ton circuit, for 125 equivalent feet (nearest to
130.2), the OD is 1-1/8 inches
7. From Table 3, for 1-1/8" OD long-radius elbows, the equivalent feet is:
6 elbows x 1.9 feet = 11.4 feet
8. Adding equivalent feet from step #7 to step #1 gives:
11.4 feet + 117 feet = 128.4 feet
Table 7 Additional Suction Accumulator Line
Required Length in Feet of Field Installed Suction Line Accumulator
Liquid Line
Length in
Actual Ft.
35 Ton Circuit 40 Ton Circuit 50 Ton Circuit 60 Ton Circuit
2 1/8" O.D.
Suction
Line
2 5/8" O.D.
Suction
Line
2 1/8" O.D.
Suction
Line
2 5/8" O.D.
Suction
Line
2 5/8" O.D.
Suction
Line
3 1/8" O.D.
Suction
Line
2 5/8" O.D.
Suction
Line
31/8"O.D.
Suction
Line
20
1 1 5 3 9 6 14 10
40
7 5 14 9 15 11 21 15
60
14 9 23 15 21 15 27 19
80
20 13 32 21 28 19 33 23
100
26 17 N/A 26 34 24 40 28
120
32 21 N/A 32 40 28 46 32
140
N/A 25 N/A 38 46 33 52 37
160
N/A 29 N/A 43 53 37 N/A 41
180
N/A 33 N/A 49 59 41 N/A 45
200
N/A 37 N/A 55 65 46 N/A 50
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